Create Air

You create 15 cubic feet of air at a pressure of 1 atmosphere in a space that you can see. Any air already within the space will be pushed out as with Gust of Wind spell. If air within the area cannot escape, pressure within that area increases proportionate to the space. In general, most creatures can withstand up to 20 atmospheres safely. Between 20 and 30 atmospheres, a creature must make a con save or take 1d10 bludgeoning damage (save for half damage). The damage doubles every 10 atmospheres. If the pressure is suddenly released, Any creature within the area takes 1d10 bludgeoning damage for every 10 atmospheres (con save for half damage).